[PATCH 1/2] drm/ofdrm: Cast PCI IDs to u32 for comparing

[Thomas Zimmermann]

Properties of 32-bit integers are returned from the OF device tree
as type __be32. Cast PCI vendor and device IDs from __be32 to u32
before comparing them to constants. Fixes sparse warnings shown below.

  drivers/gpu/drm/tiny/ofdrm.c:237:17: warning: restricted __be32 degrades to integer
  drivers/gpu/drm/tiny/ofdrm.c:238:18: warning: restricted __be32 degrades to integer
  drivers/gpu/drm/tiny/ofdrm.c:238:54: warning: restricted __be32 degrades to integer

See [1] for the bug report.

Reported-by: kernel test robot <lkp at intel.com>
Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Link: https://lore.kernel.org/dri-devel/202210192208.D888I6X7-lkp@intel.com/ # [1]
---
 drivers/gpu/drm/tiny/ofdrm.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tiny/ofdrm.c b/drivers/gpu/drm/tiny/ofdrm.c
index 0e1cc2369afcc..0da8b248ccc6e 100644
--- a/drivers/gpu/drm/tiny/ofdrm.c
+++ b/drivers/gpu/drm/tiny/ofdrm.c
@@ -231,8 +231,11 @@ static u64 display_get_address_of(struct drm_device *dev, struct device_node *of
 	return address;
 }
 
-static bool is_avivo(__be32 vendor, __be32 device)
+static bool is_avivo(__be32 vendor_id, __be32 device_id)
 {
+	u32 vendor = (__force u32)vendor_id;
+	u32 device = (__force u32)device_id;
+
 	/* This will match most R5xx */
 	return (vendor == PCI_VENDOR_ID_ATI) &&
 	       ((device >= PCI_VENDOR_ID_ATI_R520 && device < 0x7800) ||
-- 
2.38.0